starbucks got a roasting for paying no corporation tax on new sales of some $600 million. it's now volunteered to make some payments. starbucks arrangements are perfectly legal and typical of a multinational of its kind. but critics have not been silent, forcing starbucks into damage control. >> one of the things that's really tricky about that situation on corporation tax is how do you educate the public of the complexities of the british tax code, and does the public really care about those intricacies? probably not. so, on the one hand, by educating the public, you look defensive. by not educating them, then you're almost encouraging them to think that you are a big, greedy, terrible company trying to exploit your workers. it's a very difficult thing to play. >> big numbers expected later on from starbucks. >> aaron, thank you, thank you. do stay with us. there's much more to come here on "g.m.t." our science correspondent explains why biscuits provide a clue to the link between dogs and their canine ancestors. >> now, to the controversial construction of winter in airl